Oxygen concentration detector
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United States of America Patent
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-
Aug 13, 2002
Grant Date -
N/A
app pub date -
Jan 31, 1996
filing date -
Feb 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An oxygen concentration detector comprises a solid electrolyte 21, a sensing element 2 which consists of the solid electrolyte 21 coated on the surface with an outer electrode 23, a heater 3 provided inside the solid electrolyte 21, and a protecting cover 16 which protects the sensing element 2. The protecting cover 16 has two levels of openings 161, 162, the outer electrode 23 is constructed within the range defined by the length of the heat-generating part 31 of the heater 3, and the relationship between the length L.sub.1 of the heat-generating part 31 and the distance between the openings L.sub.2 of the two levels of openings 161, 162 in the axial direction is such that L.sub.1 /L.sub.2 =0.9 to 1.3.
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